support custom .startSymbol
Merge pull request #16 from wolfg1969/master

support custom $interpolate.startSymbol

I'll merge this for now, but I think I actually should change the output to use a span tag with ng-bind-html just in case someone wishes to use other HTML tags with the output.

Thanks for pointing this out.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	dialogs.js